This technical note proposes a method for relating
multiple images in a TIFF file in a hierarchical fashion.
It doesn't address the key problem with multiple image
TIFF, namely a complete lack of semantics.

This is a draft proposal by some members of the JBIG
Alliance on how to include JBIG-compressed binary and
low-depth grayscale data into a TIFF file. Being weighed
by Adobe Corporation for inclusion in the forthcoming
TIFF version 7.0.